/ Dictionary / Index I incunable: Meaning and Definition of Find definitions for: in•cu•na•ble Pronunciation: (in-ky'nu-bul), [key] — n. a book constituting part of a collection of incunabula. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. incumbrance incunabula Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language